BASO J991MDA-2 Pilot Burner

The BASO J991MDA-2 Pilot Burner is a critical ignition component engineered for high-reliability performance in commercial and industrial gas-fired equipment. This aerated pilot burner features a #1 tip position (90-degree left-hand) configuration, ensuring precise flame impingement on the thermocouple or thermopile. As a direct replacement for the J991MDA-2H, it maintains identical fit, form, and function, simplifying field maintenance for service technicians. This unit is designed for use with natural gas or liquid propane applications, depending on the installed orifice size, and is frequently found in HVACR heating systems and commercial cooking appliances. Its durable construction resists carbon buildup and thermal fatigue, providing a stable pilot flame even in high-draft environments. When troubleshooting pilot ignition failure, technicians should verify that the thermocouple connection and orifice alignment meet manufacturer specifications for optimal millivolt output and system safety.

Key Benefits

• Universal Compatibility: Fully interchangeable with the J991MDA-2H model for seamless integration into existing gas trains.
• Precise Flame Positioning: The #1 tip orientation ensures consistent heat transfer to sensing elements, reducing nuisance lockouts.
• Field Reliability: Built with robust materials to withstand the high-temperature environment of an active combustion chamber.
• Optimized Aeration: Engineered to provide a clean, blue flame that minimizes soot accumulation on the pilot assembly.

Common Questions

Is the BASO J991MDA-2 compatible with LP gas?
Yes, this pilot burner can be used with both natural gas and LP, provided the correct orifice is installed to match the specific fuel type and BTU requirements.

What is the difference between J991MDA-2 and J991MDA-2H?
There is no functional difference; the J991MDA-2 is identical to the J991MDA-2H and serves as a direct drop-in replacement.

Why is my pilot flame lifting off the burner tip?
Flame lifting usually indicates high gas pressure or an incorrect orifice size. Ensure the pilot regulator is adjusted to the specifications found on the appliance nameplate.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.